Anticaries confectionaries and oral health products

ABSTRACT

Anticaries ingredients for corn and cane sugar containing confectionaries such as syrups, mints, and candies, and for oral health products such as mouthwashes, lozenges, toothpastes and toothpowders are presented. The anticaries ingredients include aliphatic mono and dialdehydes having from 2 to 6 carbon atoms, aliphatic monoaldehydes having from 6 to 12 carbon atoms, and polyaldehydes such as dialdehyde starch and dialdehyde galactomannan gum. These ingredients in concentrations of about 5 percent by weight or less have been found to effectively inhibit the growth and acid production of oral microorganisms and thereby reduce the incidence of dental caries.

This application is a continuation-in-part of our co-pending patentapplications Ser. Nos. 855,763; 855,764; and 855,770, filed Sept. 5,1969, and our co-pending patent application Ser. No. 858,996, filedSept. 18, 1969, a continuation-in-part of patent application Ser. No.790,314, filed Jan. 10, 1969, now abandoned. Said prior applications arenow, respectively, U.S. Pat. Nos. 3,679,792; 3,629,395; 3,749,766; and3,651,206.

This invention relates to the prevention of dental caries byincorporating small amounts of anticaries agents in confectionaries,such as syrups, candy, and mints, and oral health problems, such asmouthwash, lozenges, toothpaste, and toothpowder. The anticaries agentsof this invention are effective against oral microorganisms and havebeen found to inhibit the growth and lactic acid production of thesemicroorganisms.

Heretofore, it has been generally known and accepted that theelaboration of acid through the breakdown of readily fermentablecarbohydrates by acidogenic oral bacteria is the primary cause of dentalcaries. The method or mechanism of dental caries is generallycharacterized bya decalcification of the inorganic portion of the toothand is accompanied or followed by a disintegration of the organicmatrix. If acids are permitted to form on the tooth surface, or onceformed if they are not neutralized or otherwise removed, thedemineralization of the tooth will proceed. by a

Dentifrices and similar preparations applied to the tooth surface andgums have been one means customarily employed in the cleaning of teeth.In addition, certain medicated dentifrices having the ability to inhibittooth decay and control dental caries have been developed and marketed.The inhibiting agents of choice in such medicated dentifrices includefluorides or amides.

Another means for control of dental caries involves the use of sodiumfluoride, This component may be added to drinking water or topicallyapplied to tooth surfaces to provide a systemic effect. Sodium fluoridehas been accorded some degree of acceptance in this regard. Stillanother means for control of dental caries involves the use ofantibiotics such as penicillin. Antibiotics have produced some desirableresults in control of dental caries; but this means is not withoutcertain disadvantages involving sensitization of the patient whichthereby limits its value as a means of control of dental caries.

While numerous means have been proposed as potential candidates forinhibiting or neutralizing acid formation in the oral cavity, it appearsthat the problem of control of dental caries is much more complex. Ithas definitely been established that application of conventionaldentrifice preparations by the consumer once or twice a day is notsufficient to control dental caries. Control of dental caries ideallyrequires the application of a substance capable of inhibitingacid-producing bacteria in the oral cavity which substance has prolongedeffects. Following introduction of the substance into the oral cavityprotection must be provided by inhibiting the degradation process duringthe periods between applications, if not longer. Conventionaldentrifices fail to provide such protection, because these dentrificesand their inhibitory additives are soon washed from the oral cavity.Conventional active ingredients are normally in contact with theacid-producing microorganisms an insufficient period of time to achieveprolonged inhibitory effects.

In an effort to provide more effective anticaries treatments it has beendiscovered that certain aliphatic aldehydes, dialdehydes, polyaldehydes,and certain phosphorous containing compounds exhibit a marked anticarieseffect when incorporated in chewing gum. These chewing gum compositionsare the subject of our co-pending patent applictions identified asfollows: Ser. No. 858,996 filed Sept. 18, 1969, a continuation-in-partof application Ser. No. 790,314 filed Jan. 10, 1969; Ser. No. 855,770,Ser. No. 855,763, and Ser. No. 855,764, all filed Sept. 5, 1969.

The anticaries agents in the chewing gum compositions described in theabove patent applications act to inhibit acid forming microorganisms inthe mouth during chewing of the gum and for several hours after the gumis discarded. The anticaries chewing gum compositions provide in part arealistic alternative to repeated brushings of the teeth each time foodis consumed during the day to neutralize acid on the tooth surfaceformed by microorganisms normally present in the mouth.

Because the anticaries chewing gum patent applications described aboveutilize the aldehydes, dialdehydes, and polyaldehydes of this inventionas anticaries ingredients in chewing gum the disclosures of the saidpatent applications are hereby incorporated by reference.

Although a prolonged anticaries effect has been achieved through the useof fluorides as additives in a wide variety of compositions includingtoothpastes, and drinking water, fluorides primarily act systemically tomodify the basic structure of the inorganic portion of the tooth ratherthan against acid producing mircroorganisms. Because a systemic actionis involved the use of fluoride additives in large quantities may haveundesirable side effects such as discoloration of the tooth surface.Fluorides therefore are used in dilute concentrations, which althougheffective to increase resistance to dental caries do not inhibit thecause of dental caries.

The anticaries chewing gum compositions of over above-identified patentapplications achieve the desired prolonged anticaries effect withoutundesirable side effects when used either as a supplement to regularbrushing, or as an alternative when brushing is not possible.

However, it has now been discovered, that the aliphatic monoaldehydes,dialdehydes, and polyaldehydes utilized as anticaries ingredients in thechewing gum compositions are capable of broader application, and maysuccessfully be incorporated into a variety of oral health formulationsand confectioneries such as sugar syrups, candies, mints, and lozenges.These vehicles introduce effective amounts of the anticaries agents intothe mouth, and do not require the mastication associated with chewinggum. When the anticaries agent is released from the vehicle it comesinto contact with microorganisms normally present in the mouth,inhibiting bacterial growth and lactic acid production which initiatesor is associated with dental caries and pyorrhea.

The use, as anticaries agents, of the following monoaldehydes,dialdehydes, and polyaldehydes is contemplated within the scope of thisinvention: glyoxal, pyruvaldehyde, glycolaldehyde, d,1-glyceraldehyde,hydroxypropionaldehyde, glutaraldehyde, succinic dialdehyde,2,4-hexadienal, mesoxalic dialdehyde, 2-hydroxyadipaldehyde,n-hexaldehyde, 2-hexene-1-al, n-heptaldehyde, octanaldehyde,nonanaldehyde, citral, decanaldehyde, undecylic aldehyde, undecylenicaldehyde, dodecyl (lauric) aldehyde, methylnonylacetaldehyde, dialdehydestarch and dialdehyde galactomannan gum.

The preferred anticaries agents specifically utilized in thecompositions of this invention are water soluble, low molecular weight,aliphatic mono and dialdehydes such as pyruvaldehyde, glycolaldehyde,d,1-glyceraldehyde, glutaraldehyde and αhydroxypropionaldehyde, higheraliphatic aldehydes such as oil soluble, monoaldehydes having from 8 to12 carbon atoms, citral of natural origin, polyaldehydes such asdialdehyde starch and dialdehyde galactomannan gum, and mixturesthereof.

Accordingly, it is an object of this invention to provide anticariesingredients for compositions intended to be ingested, masticated,dissolved, or otherwise taken into the oral cavity whereby theanticaries ingredient comes into contact with microorganisms normallypresent in the mouth.

It is another object to provide aldehyde compounds adapted to beutilized as ingredients in a wide variety of compositions normallyintroduced into the mouth which aldehydes upon contact with lactic acidproducing microorganisms act to inhibit the growth and acid productionof these microorganisms.

It is still another object to provide oral health products such asmouthwash, toothpaste, toothpowder, lozenges, and confectioneriescontaining significant amounts of cane or corn sugar which contain ananticaries agent effective against oral microorganisms which areassociated with dental caries.

It is still another object to provide an anticaries agent comprising oneor more low molecular weight mono or dialdehyde, monoaldehydes havingfrom 8 to 12 carbon atoms and polyaldehydes adapted to be blended,dissolved, or otherwise incorporated as in emulsion or a cationic,water-soluble ingredient in oral health products and confectioneries ofall types to inhibit the growth of acid production of oralmicroorganisms.

It is yet another object to provide confectioneries and other foods withanticaries activity by introducing one or more aldehydes in quantitiesof up to five percent by weight into dextrose or sucrose syrups orsolids normally employed in the formulation of confectioneries such asthin mints, hard candy, taffy, and wafers formed by compression,hot-melt, or molding.

These and other objects will become readily apparent with reference tothe following discussion.

In accordance with the above objects, it has been discovered thataldehydes of the class described exhibit excellent inhibition of lacticacid formation and growth of oral streptococci and bacilli. As a resultof extensive tests, studies and experimentation, both in vitro and invivo of these compounds in the vehicles above described, it has beenobserved that they exhibit excellent inhibition of lactic acid formationand growth of oral microorganisms of the genera, Lactobacillus andStreptococcus and related microorganisms found in the oral cavity.Additionally, it has been observed that these compounds are readilyincorporated into the vehicles of this invention and are releasedtherefrom upon entry into the oral cavity in quantities sufficient toprovide the level of activity desired for control of dental caries.

The anticaries ingredients of this invention are well known aldehydes,and with the exception of pyruvaldehyde, available in forms of a purityapplicable to incorporation in foods. Pyruvaldehyde is obtained as anaqueous distillate or as an aqueous phase from a condensed azeotrope. Itis nearly colorless, contains approximately 20 to 60 percentsubstantially pure pyruvaldehyde and contains less than 0.04 percentformaldehyde. This process is described in co-pending patent applicationSer. No. 714,793 filed Mar. 21, 1968, now U.S. Pat. No. 3,607,943 andassigned to the assignee of this invention. Further purification mayprovide a formaldehyde content of less than 0.02 percent by weight asoutlined in co-pending patent application Ser. No. 714,807 filed Mar.21, 1968 now U.S. Pat. No. 3,657,074 and also assigned to the assigneeof this invention.

Tables I, II and III following summarize in vivo evaluations ofrepresentative aldehydes. Standard laboratory techniques were used tocomplie the data presented. In each case the aldehyde was incorporatedinto each specimen's food in a one percent, by weight, quantity, over aperiod of several weeks. In all cases, caries reduction was noted. Astabulated in Tables I, II and III, each of the aldehydes testedexhibited significant reduction in both the incidence of dental cariesand the extent of dental caries in laboratory animals.

The aldehydes tested in vivo were pyruvaldehyde, d,1-glyceraldehyde,crystalline dimer, glycolaldehyde, octanaldehyde, nonanaldehyde,decanaldehyde, undecylenic aldehyde, and lauric aldehyde. Thepolyaldehydes tested were dialdehyde starch, dialdehyde starch 50percent oxidized, dialdehyde starch 90 percent oxidized, and dialdehydegalactomannan gum.

Two types of in vitro evaluations of the anticaries agents of thisinvention were conducted. Tables IV - XII summarize anticaries activityin the form of acid production inhibition and growth inhibition of theanticaries agents of this invention employed against Streptococcus orLactobacillus organisms, or against mixed oral organisms from humansubjects. The data was compiled through well-known broth tube analysistechniques.

Tables IV - VII summarize the acid production inhibition againstspecific strains and against mixed oral organisms of varyingconcentrations of pyruvaldehyde, d,1-glyceraldehyde, glycolaldehyde, andmixtures thereof. Table VIII summarizes the anticaries activity ofglycolaldehyde dimer, pyruvaldehyde, propionaldehyde,α-hydroxypropionaldehyde, β-hydroxypropionaldehyde, andd,1-glyceraldehyde.

Tables IX - XI summarize the anticaries activity of aliphatic C₆ - C₁₂monoaldehydes. Tables IX and X illustrate the activity against specificstrains of oral microorganisms while Table IX illustrates the activityof 2,4-hexadienal against mixed oral microorganisms. Table XIIsummarizes the activity of di and poly aldehydes against specificstrains of Lactobacillus and Streptococcus acid-producingmicroorganisms.

Other in vitro evaluations utilized a broth tube analysis ofrepresentative anticaries aldehydes incorporated in the vehicles of thisinvention against cultures of acid producing microorganisms normallypresent in the mouth. Tables XIII - XIX summarize the results thereof.Standard laboratory procedures were utilized throughout to evaluate theacid production inhibition and growth inhibition over the incubationtime of up to 24 hours.

                                      TABLE I.                                    __________________________________________________________________________    SUMMARY OF IN VIVO EVALUATIONS OF PYRUVALDEHYDE, GLYCERALDEHDYE AND           GLYCOLALDEHYDE BY STANDARD METHODS OF EVALUATION.sup.(a)                                                                       Statistical Evaluation                                       Caries Score                                                                            Evaluated                                                                            Caries Caries                           Elapsed                                                                             Number of                                                                           Strain and                                                                             Mean  Mean                                                                              Caries Incidence                                                                            Extent                  Agent    Test Days                                                                           Animals                                                                             Animal   Incidence                                                                           Extent                                                                            Reduction.sup.(b)                                                                    Reduction                                                                            Reduction             __________________________________________________________________________    Pyruvaldehyde                                                                            90    8     Osborne-Mendel                                                                         8.6   21.7                                                                              +++    Significant                                                                          Significant                                  strain 1, rat                                          Control (RCD diet)                                                                             7     "        23.3  64.8                                    Pyruvaldehyde                                                                            90    20    Osborne-Mendel                                                                         5.95  14.55                                                                             ++     Significant                                                                          Significant                                  strain 2, rat                                          Control (L-2000 diet)                                                                          20    "        15.08 38.80                                   Glyceraldehyde                                                                           56    8     Albino, Hamster                                                                        8.0   21.8                                                                              +++    Significant                                                                          Significant           Control (L-2000 diet)                                                                          8              27.5  80.9                                    Glyceraldehyde,                                                                          91    8     Osborne-Mendel                                                                         15.0  29.4                                                                              ++     Significant                                                                          Significant           crystalline dimer      strain 2, rat                                          Control (L-2000 diet)                                                                          8              23.5  51.0                                    Glycolaldehyde                                                                           90    20    Osborne-Mendel                                                                         5.53  13.19                                                                             ++     Significant                                                                          Significant                                  strain 1, rat                                          Control (RCD Diet)                                                                             20             12.85 35.45                                   Glycolaldehyde                                                                           90    20    Osborne-Mendel                                                                         5.44  11.69                                                                             ++     Significant                                                                          Significant                                  strain 2, rat                                          Control (L-2000 diet)                                                                          20             13.94 35.38                                   __________________________________________________________________________     .sup.(a) Agents were incorporated in the diet at a 1 percent level.           .sup.(b) Symbols designate the following approximate degree of caries         reduction: ++ 50 percent, +++ 75 percent.                                     .sup.(c) Evaluated by Student's test at the 95 percent confidence limit. 

                                      TABLE II.                                   __________________________________________________________________________    SUMMARY OF IN VIVO EVALUATIONS OF ALDEHYDES BY STANDARD                       METHODS OF EVALUATION.sup.(a)                                                                                                  Statistical                                                                   Evaluation.sup.(c)                                           Caries Score                                                                            Evaluated                                                                            Caries Caries                           Elapsed                                                                             Number of                                                                           Strain and                                                                             Mean  Mean                                                                              Caries Incidence                                                                            Extent                  Agent    Test Days                                                                           Animals                                                                             Animal   Incidence                                                                           Extent                                                                            Reduction.sup.(b)                                                                    Reduction                                                                            Reduction             __________________________________________________________________________    Octanaldehyde                                                                            90    9     Osborne-Mendel                                                                         9.8   20.4                                                                              ++     Significant                                                                          Significant                                  strain 1, rat                                          Control (RCD diet)                                                                       90    7     "        19.0  49.6                                    Octanaldehyde                                                                            90    10    Osborne-Mendel                                                                         2.9   4.1 +++    Significant                                                                          Significant                                  strain 2, rat                                          Control (L2000 diet)                                                                     90    9     "        17.4  31.3                                    Octanaldehyde                                                                            59    7     Albino, Hamster                                                                        18.6  53.8                                                                              ++     Significant                                                                          Significant           Control (L2000 diet)                                                                     59    8     "        39.3  117.6                                   Nonanaldehyde                                                                            90    7     Osborne-Mendel                                                                         5.1   10.2                                                                              +++    Significant                                                                          Significant                                  strain 1, rat                                          Control (RCD diet)                                                                       90    7     "        14.1  34.3                                    Decanaldehyde                                                                            90    7     "        10.4  24.1                                                                              ++     Significant                                                                          Significant           Control (RCD diet)                                                                       90    7     "        17.6  46.0                                    Undecylenic aldehyde                                                                     90    6     "        7.4   16.4                                                                              +++    Significant                                                                          Significant           Control (RCD diet)                                                                       90    5     "        22.3  54.6                                    Lauric aldehyde                                                                          90    10    Osborne-Mendel                                                                         10.0  15.6                                                                              ++     Significant                                                                          Significant                                  strain 2, rat                                          Control (L2000 diet)                                                                     90    9     "        17.4  31.3                                    __________________________________________________________________________     .sup.(a) Agents were incorporated in the diet at a 1 percent level.           .sup.(b) Symbols designate the following approximate degree of caries         reduction: ++ 50 percent, +++ 75 percent                                      .sup.(c) Evaluated by Student's test at the 95 percent confidence limit. 

                                      TABLE III.                                  __________________________________________________________________________    SUMMARY OF IN VIVO EVALUATION OF DIALDEHYDE STARCHES                          AND POLYSACCHARIDE GUM DETERMINED BY STANDARD METHODS                         OF EVALUATION.sup.(a)                                                                   Elapsed                                                                            Number of      Caries Score                                                                            Evaluated                                       Test Animals                                                                             Strain and                                                                             Mean  Mean                                                                              Caries                                 Agent    Days on Test                                                                             Animal   Incidence                                                                           Extent                                                                            Reduction.sup.(b)                     __________________________________________________________________________    Dasol A (water-                                                               soluble dialde-      Syrian                                                   hyde starch)                                                                            56   8     hamster  2.0   6.0 +                                     Controls                                                                      (fortified           Syrian                                                   L-2000 diet)                                                                            56   8     hamster  5.8   18.0                                                                              -                                     Dialdehyde                                                                    starch 50%           Osborne-Mendel                                           oxidized  91   10    strain 1 rat                                                                           14.8  38.0                                                                              +                                     Controls (forti-     Osborne-Mendel                                           fied RCD diet)                                                                          91   10    strain 1 rat                                                                           17.8  45.8                                                                              -                                     Dialdehyde starch    Osborne-Mendel                                           50% oxidized                                                                            89   9     strain 2 rat                                                                           5.9   12.7                                                                              ++                                    Controls (L-2000     Osborne-Mendel                                           diet)     89   8     strain 2 rat                                                                           9.5   21.5                                                                              -                                     Dialdehyde starch    Osborne-Mendel                                           90% oxidized                                                                            92   6     strain 1 rat                                                                           7.0   13.5                                                                              ++                                    Controls             Osborne-Mendel                                           (RCD diet)                                                                              92   6     strain 1 rat                                                                           13.8  33.3                                                                              -                                     Dialdehyde                                                                    galactomannan        Osborne-Mendel                                           gum       90   7     strain 1 rat                                                                           15.7  42.9                                                                              +                                     Controls             Osborne-Mendel                                           (RCD diet)                                                                              90   7     strain 1 rat                                                                           23.3  64.8                                                                              -                                     Dialdehyde                                                                    galactomannan                                                                 gum       90   8     Osborne-Mendel                                                                strain 2 rat                                                                           3.4   5.0 +                                     Controls             Osborne-Mendel                                           (L-2000 diet)                                                                           90   8     strain 2 rat                                                                           6.3   10.6                                                                              -                                     __________________________________________________________________________     .sup.(a) Dialdehyde starches and polysaccharide gum were incorporated in      the diet at a 1% level.                                                       .sup.(b) Symbols designate the following approximate degrees of reduction     + 25%, ++ 50%.                                                           

                                      TABLE IV.                                   __________________________________________________________________________    INHIBITORY EFFECTS OF ALDEHYDE COMBINATIONS                                   ON ACID PRODUCTION BY SPECIFIC ORAL                                           MICROORGANISMS(a)                                                             Concentration, percent       Acid Production                                  Pyruvaldehyde d,                                                                       1-Glyceraldehyde                                                                       Organism   Inhibition, percent                              __________________________________________________________________________    --       0.01     Streptococcus                                                                             4                                                                 sp. FA-1                                                    --        0.015   "          10                                               --       0.02     "          21                                               0.001    --       "          10                                               0.001    0.01     "          16                                               0.001     0.015   "          44                                               0.001    0.02     "          60                                               0.002    --       "          35                                               0.002    0.01     "          70                                               0.002     0.015   "          89                                               0.002    0.02     "          91                                               --       0.02     Lactobacillus casei                                                                      11                                               --       0.03     "          17                                               --       0.04     "          22                                               0.005    --       "          24                                               0.005    0.02     "          43                                               0.005    0.03     "          58                                               0.005    0.04     "          72                                                0.0075  --       "          57                                                0.0075  0.02     "          83                                                0.0075  0.03     "          89                                                0.0075  0.04     "          93                                               __________________________________________________________________________     (a)Measured by broth-tube technique.                                     

                                      TABLE V.                                    __________________________________________________________________________    INHIBITORY EFFECTS OF ALDEHYDE COMBINATIONS                                   ON ACID PRODUCTION BY MIXED ORAL                                              MICROORGANISMS(a)                                                             Concentration, percent    Acid Production                                     Pyruvaldehyde d,                                                                       1-Glyceraldehyde                                                                       Organism                                                                              Inhibition, percent                                 __________________________________________________________________________    --       0.03     Mixed Oral                                                                            7                                                                     Microorganisms                                              --       0.04     "       12                                                  --       0.05     "       19                                                  --       0.06     "       30                                                  --       0.07     "       40                                                  0.005    --       "       5                                                   0.005    0.03     "       18                                                  0.005    0.04     "       22                                                  0.005    0.05     "       36                                                  0.005    0.06     "       49                                                  0.005    0.07     "       56                                                  0.007    --       "       5                                                   0.007    0.03     "       26                                                  0.007    0.04     "       30                                                  0.007    0.05     "       44                                                  0.007    0.06     "       60                                                  0.007    0.07     "       65                                                  0.009    --       "       7                                                   0.009    0.03     "       27                                                  0.009    0.04     "       28                                                  0.009    0.05     "       49                                                  0.009    0.06     "       62                                                  0.009    0.07     "       68                                                  0.011    --       "       7                                                   0.011    0.03     "       37                                                  0.011    0.04     "       53                                                  0.011    0.05     "       63                                                  0.011    0.06     "       66                                                  __________________________________________________________________________     (a)Measured by broth-tube technique.                                     

                                      TABLE VI.                                   __________________________________________________________________________    INHIBITORY EFFECTS OF ALDEHYDE COMBINATIONS                                   ON ACID PRODUCTION BY SPECIFIC ORAL                                           MICROORGANISMS(a)                                                             Concentration, percent     Acid Production                                    Pyruvaldehyde                                                                         Glycolaldehyde                                                                        Organism   Inhibition, percent                                __________________________________________________________________________    --      0.02    Streptococcus                                                                            19                                                                 sp. FA-1                                                      --      0.03    "          39                                                 --      0.04    "          72                                                 0.001   --      "          10                                                 0.001   0.02    "          38                                                 0.001   0.03    "          79                                                 0.001   0.04    "          96                                                 0.002   --      "          35                                                 0.002   0.02    "          90                                                 0.002   0.03    "          96                                                 0.002   0.04    "          98                                                 --      0.02    Lactobacillus casei                                                                      18                                                 --       0.025  "          23                                                 --      0.03    "          27                                                 0.005   --      "          24                                                 0.005   0.02    "          44                                                 0.005   0.03    "          56                                                  0.0075 --      "          57                                                  0.0075 0.02    "          67                                                  0.0075  0.025  "          71                                                  0.0075 0.03    "          77                                                 __________________________________________________________________________     (a)Measured by broth-tube technique.                                     

                                      TABLE VII.                                  __________________________________________________________________________    INHIBITORY EFFECTS OF ALDEHYDE COMBINATIONS                                   ON ACID PRODUCTION BY SPECIFIC ORAL                                           MICROORGANISMS(a)                                                             Concentration, percent        Acid Production                                 d, 1-Glyceraldehyde                                                                      Glycolaldehyde                                                                        Organism   Inhibition, percent                             __________________________________________________________________________    --         0.02    Streptococcus                                                                            19                                                                 sp. FA-1                                                   --         0.03    "          39                                              --         0.04    "          72                                              0.01       --      "           4                                              0.01       0.02    "          13                                              0.01       0.03    "          32                                              0.01       0.04    "          71                                               0.015     --      "          10                                               0.015     0.02    "          14                                               0.015     0.03    "          37                                               0.015     0.04    "          89                                              0.02       --      "          21                                              0.02       0.02    "          24                                              0.02       0.03    "          47                                              0.02       0.04    "          85                                              --         0.02    Lactobacillus casei                                                                      18                                              --          0.025  "          23                                              --         0.03    "          27                                              0.02       --      "          11                                              0.02       0.02    "          22                                              0.02        0.025  "          23                                              0.02       0.03    "          32                                              0.03       --      "          17                                              0.03       0.02    "          25                                              0.03        0.025  "          29                                              0.03       0.03    "          35                                              0.04       --      "          22                                              0.04       0.02    "          33                                              0.04        0.025  "          37                                              0.04       0.03    "          44                                              __________________________________________________________________________     (a)Measured by broth-tube technique.                                     

                                      TABLE VIII.                                 __________________________________________________________________________    CARIOSTATIC COMPOUNDS AND RELATED STRUCTURES;                                 COMPARISON OF ACTIVITY AGAINST ORAL MICROORGANISMS                            IN VITRO                                                                      Compound                                                                      Formula                                                                       Empirical                                                                           Structural                                                                              Name          Activity(a)                                     __________________________________________________________________________    (C.sub.2 H.sub.4 O.sub.2).sub.2                                                     (HOCH.sub.2 CHO).sub.2                                                                  Glycolaldehyde, dimer                                                                       ++++                                            C.sub.3 H.sub.4 O.sub.2                                                             CH.sub.3 COCHO                                                                          Pyruvaldehyde ++++                                            C.sub.3 H.sub.6 O                                                                   CH.sub.3 CH.sub.2 CHO                                                                   Propionaldehyde                                                                             +                                               C.sub.3 H.sub.6 O.sub.2                                                             CH.sub.3 CHOCHO                                                                         α-Hydroxypropionaldehyde                                                              +++                                             C.sub.3 H.sub.6 O.sub.2                                                             HOCH.sub.2 CH.sub.2 CHO                                                                 β-Hydroxypropionaldehyde                                                               +-                                              C.sub.3 H.sub.6 O.sub.3                                                             HOCH.sub.2 CHOHCHO                                                                      Glyceraldehyde                                                                              ++++                                            __________________________________________________________________________    (a)Symbols designate the following degree of inhibition:                      For Acid-Production Inhibition, percent                                                           For Growth Inhibition, percent                            __________________________________________________________________________    -        0 to 9     -      0 to 75                                            +-       10 to 24   +-    75 to 89                                            +        25 to 74   +     90 to 98                                            ++       75 to 89   ++      99 to 99.89                                       +++      90 to 98   +++    99.9 to 99.989                                     ++++      99 to 100 ++++  > 99.99                                             __________________________________________________________________________

                                      TABLE IX.                                   __________________________________________________________________________    POTENTIAL CARIOSTATIC ACTIVITY OF ALDEHYDES AS DEMONSTRATED BY GROWTH         INHIBITION OF ORAL MICROORGANISMS IN VITRO(a)                                 __________________________________________________________________________                                 Bacterial Population                                              Oral                    Inhibition                           Number                                                                            Compound   Microorganism Control                                                                            Experimental                                                                         percent                              __________________________________________________________________________    1   n-Hexaldehyde                                                                            Streptococcus spp. FA-1                                                                     5 × 10.sup.8                                                                 4 × 10.sup.8                                                                   Insignificant                                       L. casei      1 × 10.sup.9                                                                 1 × 10.sup.9                                                                   None                                 2   2-Hexene-1-al                                                                             Streptococcus spp. FA-1                                                                    4 × 10.sup.8                                                                 9 × 10.sup.7                                                                   Insignificant                                       L. casei      9 × 10.sup.8                                                                 8 × 10.sup.8                                                                   Insignificant                        3   n-Heptaldehyde                                                                            Streptococcus spp. FA-1                                                                    4 × 10.sup.8                                                                 3 × 10.sup.8                                                                   Insignificant                                       L. casei      1 × 10.sup.9                                                                 1 × 10.sup.9                                                                   None                                 4   Octanaldehyde                                                                             Streptococcus spp. FA-1                                                                    2 × 10.sup.8                                                                 9 × 10.sup.3                                                                   >99.99                                              L. casei      8 × 10.sup.8                                                                 2 × 10.sup.7                                                                    97                                  5   Nonanaldehyde                                                                             Streptococcus spp. FA-1                                                                    2 × 10.sup.8                                                                 0      100                                                 L. casei      8 × 10.sup.8                                                                 4 × 10.sup.4                                                                   >99.99                               6   Decanaldehyde                                                                             Streptococcus spp. FA-1                                                                    2 × 10.sup.8                                                                 0      100                                                 L. casei      8 × 10.sup.8                                                                 4 × 10.sup.2                                                                   >99.99                               7   Undecylic aldehyde                                                                        Streptococcus spp. FA-1                                                                    5 × 10.sup.8                                                                 2 × 10.sup.3                                                                   >99.99                                              L. casei      9 × 10.sup.8                                                                 5 × 10.sup.4                                                                   >99.99                               8   Undecylenic aldehyde                                                                      Streptococcus spp. FA-1                                                                    2 × 10.sup.8                                                                 0      100                                                 L. casei      8 × 10.sup.8                                                                 1 × 10.sup.2                                                                   >99.99                               9   Lauric aldehyde                                                                           Streptococcus spp. FA-1                                                                    2 × 10.sup.8                                                                 0      100                                                 L. casei      8 × 10.sup.8                                                                 <1 × 10.sup.2                                                                  >99.99                               10  Methylnonylacetal-                                                                        Streptococcus spp. FA-1                                                                    2 × 10.sup.8                                                                 0      100                                      dehyde     L. casei      8 × 10.sup.8                                                                 <1 × 10.sup.3                                                                  >99.99                               __________________________________________________________________________     (a)Determined on freshly grown pure cultures. Pour plates were incubated      48 - 72 hours.                                                           

                                      TABLE X.                                    __________________________________________________________________________    CARIOSTATIC ACTIVITY OF ALDEHYDES                                             AS DEMONSTRATED BY INHIBITION OF                                              ACID PRODUCTION BY ORAL MICROORGANISMS IN VITRO                               Compound                                                                      FORMULA                            Activity.sup.(a), Acid-                    Empirical                                                                           Structural      Name         Production Inhibition%                     __________________________________________________________________________    C.sub.6 H.sub.12 O                                                                  CH.sub.3 (CH.sub.2).sub.4 CHO                                                                 n-Hexaldehyde                                                                              +                                          C.sub.6 H.sub.10 O                                                                  CH.sub.3 (CH.sub.2).sub.2 CH:CHCHO                                                            2-Hexene-1-al                                                                              +++                                        C.sub.7 H.sub.14 O                                                                  CH.sub.3 (CH.sub.2).sub.5 CHO                                                                 n-Heptaldehyde                                                                             ++                                         C.sub.8 H.sub.16 O                                                                  CH.sub.3 (CH.sub.2).sub.6 CHO                                                                 Octanaldehyde                                                                              ++++                                       C.sub.9 H.sub.18 O                                                                  CH.sub.3 (CH.sub.2).sub.7 CHO                                                                 Nonanaldehyde                                                                              ++++                                       C.sub.10 H.sub.16 O                                                                 CH.sub.3 CCH.sub.3 :CH(CH.sub.2).sub.2 C:CHCHO                                                Citral       ++++                                       C.sub.10 H.sub.20 O                                                                 CH.sub.3 (CH.sub.2).sub.8 CHO                                                                 Decanaldehyde                                                                              ++++                                       C.sub.11 H.sub.22 O                                                                 CH.sub.3 (CH.sub.2).sub.9 CHO                                                                 Undecylic aldehyde                                                                         ++++                                       C.sub.11 H.sub. 20 O                                                                CH.sub.3 CH:CH(CH.sub.2).sub.7 CHO                                                            Undecylenic aldehyde                                                                       ++++                                       C.sub.12 H.sub.24 O                                                                 CH.sub.3 (CH.sub.2).sub.10 CHO                                                                Lauric aldehyde                                                                            ++++                                       C.sub.12 H.sub.24 O                                                                 CH.sub.3 (CH.sub.2).sub.8 CHCH.sub.3 CHO                                                      Methylnonylacetaldehyde                                                                    +++                                        __________________________________________________________________________    .sup.(a) Activity was measured by broth-tube assay to determine percent       of                                                                            acid-production inhibition obtained by Lactobacillus casei and                Streptococcus sp. FA-1 in the presence of 0.1 percent of compound.            Symbols designate the following degree of inhibition percent:                 -    0 to 9        ++     75 to 89                                            +-   10 to 24      +++    90 to 98                                            +    25 to 74      ++++    99 to 100                                          __________________________________________________________________________

                  TABLE XI.                                                       ______________________________________                                        EFFECTIVENESS OF 2,4-HEXADIENAL AGAINST ORAL                                  MICROORGANISMS IN VITRO(a)                                                    Compound                                                                      Concen-     Inhibition of Acid Production, percent                                 tration,   Streptococcus                                                                            Streptococcus                                                                          Lactobacillus                             Tube percent    sp. FA-1   sp. GS-5 casei                                     ______________________________________                                        1    0.01       31          8       27                                        2     0.025     92         35       43                                        3    0.05       99         97       88                                        4     0.075     99         99       94                                        5    0.10       100        100      98                                        ______________________________________                                         (a)2,4-Hexadienal was prepared as an emulsion with 4 parts of Tween 20.  

                                      TABLE XII.                                  __________________________________________________________________________    CARIOSTATIC ACTIVITY OF                                                       DIALDEHYDES AGAINST                                                           ORAL MICROORGANISMS                                                           IN VITRO                                                                      Compound                                Activity.sup.(a)                      Formula                                 Acid-Production                       Number                                                                            Empirical                                                                           Structural      Name          Inhibition, %                         __________________________________________________________________________    1   C.sub.2 H.sub.2 O.sub.2                                                             OHCCHO          Glyoxal       ++++                                  2   C.sub.3 H.sub.2 O.sub.3                                                             OHCCOCHO        Mesoxalic dialdehyde                                                                        +.sup.(b)                             3   C.sub.3 H.sub.4 O.sub.3                                                             OHCCHOHCHO      Tartronic dialdehyde                                                                        +.sup.(c)                             4   C.sub.4 H.sub.4 O.sub.2                                                             OHCCH:CHCHO     Fumaricaldehyde                                                                             +.sup.(c)                             5   C.sub.4 H.sub.6 O.sub.2                                                             OHCCH.sub.2 CH.sub.2 CHO                                                                      Succinic dialdehyde                                                                         ++++                                  6   C.sub.4 H.sub.6 O.sub.3                                                             OHCCHOHCH.sub.2 CHO                                                                           α-Hydroxysuccindi-                                                                    +.sup.(c)                                                       aldehyde                                            7   C.sub.5 H.sub.8 O.sub.2                                                             OHC(CH.sub.2).sub.3 CHO                                                                       Glutaraldehyde                                                                              ++++                                  8   C.sub.6 H.sub.6 O.sub.2                                                             OHCCH:CHCH:CHCHO                                                                              2,4-Hexadienal                                                                              ++++                                  9   C.sub.6 H.sub.10 O.sub.2                                                            OHC(CH.sub.2).sub.4 CHO                                                                       Adipaldehyde  +.sup.(c)                                                       (hexanedial)                                        10  C.sub.6 H.sub.10 O.sub.3                                                            OHC(CH.sub. 2).sub.3 CHOHCHO                                                                  2-Hydroxyadipaldehyde                                                                       +                                     11  [C.sub.6 H.sub.8 O.sub.5 ].sub.n                                                     ##STR1##       Dialdehyde starch (water soluble                                                            +ationic)                             12                        Dialdehyde galactomannan                                                                    +                                                               gum (an oxidized poly-                                                        saccharide)                                         __________________________________________________________________________     .sup.(a) Activity was measured by broth-tube assay to determine percent o     acid-production inhibition obtained by Lactobacillus casei and                Streptococcus sp. FA-1 in the presence of 0.1% of compound. Symbols           designate the following degree of inhibition, percent:                   

    - 0 to 9       ++ 75 to 89                                                           +- 10 to 24                                                                           +++90 to 98                                                           + 25 to 74                                                                            ++++ 99 to 100                                                  .sup.(b) Confirmation of purity and structure was lacking for this            compound. Actual activity could be much higher.                               .sup.(c) These compounds are not available commercially and therefore wer     not tested in vitro. However, the compounds noted should exhibit the          activity shown, and if synthesized, they would be expected to exhibit goo     anti-caries qualities.                                                   

                                      TABLE XIII.                                 __________________________________________________________________________    EFFECT OF ALDEHYDES IN SUCROSE SYRUP ON                                       ORAL MICROOGRAMISMS                                                                                Inhibition, Per cent                                                          Incubation                                                                            Acid Pro-                                         Aldehyde Microorganism                                                                            Time, Hours                                                                           duction(a)                                                                          Growth(b)                                  __________________________________________________________________________    Glycolaldehyde                                                                          Lactobacillus casei                                                                      2       0     N.S.(c)                                              ATCC 4646  5       0     93                                                              24      86    >99.99                                               Streptococcus spp.                                                                       2       19    80                                                   KI-R       5       85    >99.9                                                           24      84    >99.99                                               Mixed human oral                                                                         2       44    98                                                   microorganisms                                                                           5       90    >99.99                                                          24      85    >99                                        Pyruvaldehyde                                                                           Lactobacillus casei                                                                      2       0     97.5                                                 ATCC 4646  5       20.0  >99.99                                                          24      89.6  >99.99                                               Streptococcus spp.                                                                       2       37.5  >99.9                                                KI-R       5       82.3  >99.99                                                          24      86.4  100                                                  Mixed human oral                                                                         2       77.8  >99.9                                                microorganisms                                                                           5       92.1  >99.99                                                          24      91.8  N.S.                                       d,1-Glyceraldehyde                                                                      Lactobacillus casei                                                                      2       0     0                                                    ATCC 4646  5       30    N.S.                                                            24      79    99                                                   Streptococcus spp.                                                                       2       69    90                                                   KI-R       5       88    90                                                              24      86    99                                                   Mixed human oral                                                                         2       72    96                                                   microorganisms                                                                           5       93    99.6                                                            24      16    0                                          Glutaraldehyde                                                                          Lactobacillus casei                                                                      2       100   N.S.                                                 ATCC 4646  5       75    >N.S.                                                           24      50    N.S.                                                 Streptococcus spp.                                                                       2       100   N.S.                                                 KI-R       5       83    >99                                                             24      0     90                                                   Mixed human oral                                                                         2       100   90                                                   microorganisms                                                                           5       59    93                                                              24      0     N.S.                                       Decylaldehyde                                                                           Lactobacillus casei                                                                      2       0     99.5                                                 ATCC 4646  5       95    >99.9                                                           24      99    >99.99                                               Streptococcus spp.                                                                       2       75    >99.99                                               KI-R       5       98    >99.99                                                          24      100   N.S.                                                 Mixed human oral                                                                         2       78    >99.99                                               microorganisms                                                                           5       94    >99.99                                                          24      95    N.S.                                       __________________________________________________________________________     (a)Measured by broth-tube technique.                                          (b)Measured by pour-plate technique.                                          (c)N.S. designates not significant.                                      

                                      TABLE XIV.                                  __________________________________________________________________________    EFFECT OF ALDEHYDES IN DEXTROSE SYRUP ON                                      ORAL MICROORGANISMS                                                                                Inhibition, Per Cent                                                          Incubation                                                                            Acid Pro-                                         Aldehyde Microorganism                                                                            Time, Hours                                                                           duction(a)                                                                          Growth(b)                                  __________________________________________________________________________    Glycolaldehyde                                                                          Lactobacillus casei                                                                      2       33    N.S.(c)                                              ATCC 4646  5       3     98                                                              24      85    100                                                  Streptococcus spp.                                                                       2       57    99.1                                                 KI-R       5       81    100                                                             24      77    100                                                  Mixed human oral                                                                         2       15    99                                                   microorganisms                                                                           5       87    100                                                             24      87    91.4                                       Pyruvaldehyde                                                                           Lactobacillus casei                                                                      2       52    99.4                                                 ATCC 4646  5       33    99.99                                                           24      88    100                                                  Streptococcus spp.                                                                       2       57    100                                                  KI-R       5       86    100                                                             24      82    100                                                  Mixed human oral                                                                         2       15    99.8                                                 microorganisms                                                                           5       89    100                                                             24      83    99.99                                      d,1-Glyceraldehyde                                                                      Lactobacillus casei                                                                      2       57    N.S.                                                 ATCC 4646  5       33    N.S.                                                            24      89    >99.99                                               Streptococcus Spp.                                                                       2       48    98                                                   KI-R       5       86    >99.99                                                          24      82    >100                                                 Mixed human oral                                                                         2       8     97.5                                                 microorganisms                                                                           5       90    >99.99                                                          24      77    0                                          Glutaraldehyde                                                                          Lactobacillus casei                                                                      2       76    N.S.                                                 ATCC 4646  5       70    N.S.                                                            24      29    90                                                   Streptococcus spp.                                                                       2       70    N.S.                                                 KI-R       5       93    99.96                                                           24      0     0                                                    Mixed human oral                                                                         2       23    92.5                                                 microorganisms                                                                           5       81    90                                                              24      16    N.S.                                       Decylaldehyde                                                                           Lactobacillus casei                                                                      2       67    99.7                                                 ATCC 4646  5       77    100                                                             24      96    100                                                  Streptococcus spp.                                                                       2       35    100                                                  KI-R       5       91    100                                                             24      89    100                                                  Mixed human oral                                                                         2       0     >99.99                                               microorganisms                                                                           5       95    100                                                             24      91    100                                        __________________________________________________________________________     (a)Same as in Table XIII.                                                     (b)Same as in Table XIII.                                                     (c)Same as in Table XIII.                                                

                                      TABLE XV                                    __________________________________________________________________________    EFFECT OF ALDEHYDES IN COMPRESSED CANDY TABLET ON                             ORAL MICROORGANISMS                                                                                Incubation                                                                            Inhibition, Per Cent                              Aldehyde Microorganisms                                                                           Time, Hours                                                                           Acid Production(a)                                                                       Growth(b)                             __________________________________________________________________________    Glycolaldehyde                                                                          Lactobacillus casei                                                                      2       0          N.S.(c)                                         ATCC 4646  5       0          97.3                                                       24      64         100                                             Streptococcus spp.                                                                       2       0          99.9                                            KI-R       5       0          N.S.                                                       24      73         N.S.                                            Mixed human oral                                                                         2       0          99.3                                            Microorganisms                                                                           5       84         100                                                        24      72         100                                   Pyruvaldehyde                                                                           Lactobacillus casei                                                                      2       0          99.5                                            ATCC 4646  5       0          100                                                        24      75         100                                             Streptococcus spp.                                                                       2       0          N.S.                                            KI-R       5       30         N.S.                                                       24      83         N.S.                                            Mixed human oral                                                                         2       0          99.7                                            Microorganisms                                                                           5       89         99.99                                                      24      78         99.98                                 d,1-Glyceraldehyde                                                                      Lactobacillus casei                                                                      2       0          N.S.                                            ATCC 4646  5       0          N.S.                                                       24      73         100                                             Streptococcus spp.                                                                       2       0          0                                               KI-R       5       25         N.S.                                                       24      84         N.S.                                            Mixed human oral                                                                         2       0          99.7                                            Microorganisms                                                                           5       91         99.99                                                      24      87         N.S.                                  Glutaraldehyde                                                                          Lactobacillus casei                                                                      2       0          N.S.                                            ATCC 4646  5       33         N.S.                                                       24      81         99.5                                            Streptococcus spp.                                                                       2       100        N.S.                                            KI-R       5       100        N.S.                                                       24      100        N.S.                                            Mixed human oral                                                                         2       100        97.3                                            Microorganisms                                                                           5       100        99.8                                                       24      0          N.S.                                  Decylaldehyde                                                                           Lactobacillus casei                                                                      2       0          99.98                                           ATCC 4646  5       67         100                                                        24      97         100                                             Streptococcus spp.                                                                       2       50         N.S.                                            KI-R       5       85         N.S.                                                       24      98         N.S.                                            Mixed human oral                                                                         2       100        >99.99                                          Microoganisms                                                                            5       100        >99.99                                                     24      19         100                                   __________________________________________________________________________     (a)Same as in Table XIII.                                                     (b)Same as in Table XIII.                                                     (c)Same as in Table XIII.                                                

                  TABLE XVI                                                       ______________________________________                                        EFFECT OF PYRUVALDEHYDE IN HARD                                               CANDY ON ORAL MICROORGANISMS                                                                    Inhibition, Per Cent                                                     Incubation Acid                                                  Microorganism                                                                              Time, Hours                                                                              Production(a)                                                                            Growth(b)                                  ______________________________________                                        Lactobacillus casei                                                                        2           0         92                                         ATCC 4646    5          22         99.85                                                   24         90         100                                        Streptococcus spp.                                                                         2          40         >99.99                                     KI-R         5          87         >99.99                                                  24         86         100                                        Mixed human oral                                                                           2          20         99.5                                       Microorganisms                                                                             5          93         100                                                     24         84         N.S.(c)                                    ______________________________________                                         (a)Same as in Table XIII.                                                     (b)Same as in Table XIII.                                                     (c)Same as in Table XIII.                                                

                                      TABLE XVII                                  __________________________________________________________________________    EFFECT OF ALDEHYDES IN MOUTHWASH ON ORAL MICROORGANISMS                                             Incubation                                                                            Inhibition, Per cent                            Aldehyde    Microorganism                                                                           Time, Hours                                                                           Acid Production.sup.(a)                                                                   Growth.sup.(b)                      __________________________________________________________________________    Glycolaldehyde                                                                             Streptococcus spp.                                                                     2       0           99.98                                           KI-R      5       0           100                                                       24      78          100                                             Mixed human oral                                                                        2       0           99.7                                            Microorganisms                                                                          5       87          100                                                       24      80          99.90                               Pyruvaldehyde                                                                             Streptococcus spp.                                                                      2       0           >99.99                                          KI-R      5       0           >99.99                                                    24      86          100                                             Mixed human oral                                                                        2       0           99.0                                            Microorganisms                                                                          5       94          100                                                       24      87          99.7                                d, 1-Glyceraldehyde                                                                       Streptococcus spp.                                                                      2       0           >99.99                                          KI-R      5       0           99.99                                                     24      86          100                                             Mixed human oral                                                                        2       0           95.0                                            Microorganisms                                                                          5       91          99.98                                                     24      39          N.S..sup.(c)                        Glutaraldehyde                                                                             Streptococcus spp.                                                                     2       0           100                                             KI-R      5       0           99.999                                                    24      99          100                                             Mixed human oral                                                                        2       0           100                                             Microorganisms                                                                          5       100         100                                                       24      91          99.9                                __________________________________________________________________________     .sup.(a) Same as in Table XIII.                                               .sup.(b) Same as in Table XIII.                                               .sup.(c) Same as in Table XIII.                                          

                                      TABLE XVIII                                 __________________________________________________________________________    EFFECT OF ALDEHYDES IN TOOTHPASTE ON ORAL MICROORGANISMS                                            Incubation                                                                            Inhibition, Per cent                            Aldehydes   Microorganism                                                                           Time, Hours                                                                           Acid Production.sup.(a)                                                                   Growth.sup.(b)                      __________________________________________________________________________    Glycolaldehyde                                                                             Lactobacillus casei                                                                    2       0           0                                               ATCC 4646 5       0           N.S..sup.(c)                                              24      0           100                                             Streptococcus spp.                                                                      2       0           0                                               KI-R      5       0           N.S.                                                      24      0           N.S.                                            Mixed human oral                                                                        2       0           N.S.                                            Microorganisms                                                                          5       0           N.S.                                                      24      0           100                                 Pyruvaldehyde                                                                             Lactobacillus casei                                                                     2       0           N.S.                                            ATCC 4646 5       0           N.S.                                                      24      0           100                                             Streptococcus spp.                                                                      2       0           N.S.                                            KI-R      5       0           N.S.                                                      24      0           N.S.                                            Mixed human oral                                                                        2       0           100                                             Microorganisms                                                                          5       0           N.S.                                                      24      0           100                                 d, 1-Glyceraldehyde Lactobacillus casei                                                   2         0       N.S.                                                        ATCC 4646 5       0           N.S.                                                      24      0           100                                             Streptococcus spp.                                                                      2       0           N.S.                                            KI-R      5       0           N.S.                                                      24      0           0                                               Mixed human oral                                                                        2       0           97                                              Microorganisms                                                                          5       0           N.S.                                                      24      0           100                                 Glutaraldehyde                                                                            Lactobacillus casei                                                                     2       80          N.S.                                            ATCC 4646 5       80          N.S.                                                      24      50          0                                               Streptococcus spp.                                                                      2       100         N.S.                                            KI-R      5       100         N.S.                                                      24      84          N.S.                                            Mixed human oral                                                                        2       0           0                                               Microorganisms                                                                          5       0           N.S.                                                      24      0           N.S.                                Decylaldehyde                                                                             Lactobacillus casei                                                                     2       80          0                                               ATCC 4646 5       80          N.S.                                                      24      83          0                                               Streptococcus spp.                                                                      2       40          0                                               KI-R      5       100         N.S.                                                      24      67          N.S.                                            Mixed human oral                                                                        2       0           N.S.                                            Microorganisms                                                                          5       0           N.S.                                                      24      0           0                                   __________________________________________________________________________     .sup.(a) Same as in Table XIII.                                               .sup.(b) Same as in Table XIII.                                               .sup.(c) Same as in Table XIII.                                          

                                      TABLE XIX                                   __________________________________________________________________________    EFFECT OF ALDEHYDES IN TOOTH POWDER ON ORAL MICROORGANISMS                                          Incubation                                                                            Inhibition, Per cent                            Aldehyde    Microorganism                                                                           Time, Hours                                                                           Acid Production.sup.(a)                                                                   Growth.sup.(b)                      __________________________________________________________________________    Glycolaldehyde                                                                             Lactobacillus casei                                                                    2       0           N.S..sup.(c)                                    ATCC 4646 5       0           N.S.                                                      24      73          99.99                                           Streptococcus spp.                                                                      2       0           N.S.                                            KI-R      5       0           93.3                                                      24      0           100                                             Mixed human oral                                                                        2       0           N.S.                                            MICROORGANISMS                                                                          5       82          99.97                                                     24      77          100                                 Pyruvaldehyde                                                                             Lactobacillus casei                                                                     2       0           N.S.                                            ATCC 4646 5 0     98                                                                    24      71          100                                             Streptococcus spp.                                                                      2       0           100                                             KI-R      5       0           100                                                       24      0           100                                             Mixed human oral                                                                        2       0           N.S.                                            Microorganisms                                                                          5       86          99.99                                                     24      80          99.94                               d, 1-Glyceraldehyde                                                                       Lactobacillus casei                                                                     2       0           N.S.                                            ATCC 4646 5       0           N.S.                                            24        84      99.3                                                        Streptococcus spp.                                                                      2       0           99.88                                           KI-R      5       0           99.99                                                     24      0           100                                             Mixed human oral                                                                        2       0           N.S.                                            microorganisms                                                                          5       48          99.3                                                      24      18          N.S.                                Glutaraldehyde                                                                            Lactobacillus casei                                                                     2       0           N.S.                                            ATCC 4646 5       33          N.S.                                                      24      21          N.S.                                            Streptococcus spp.                                                                      2       0           N.S.                                            KI-R      5       0           N.S.                                                      24      0           N.S.                                            Mixed human oral                                                                        2       67          N.S.                                            Microorganisms                                                                          5       95          96.6                                                      24      45          N.S.                                Dodecylaldehyde                                                                           Lactobacillus casei                                                                     2       0           99.5                                            ATCC 4646 5       0           >99.99                                                    24      93          99.99                                           Streptococcus spp.                                                                      2       0           99.2                                            KI-R      5       0           >99.99                                                    24      0           100                                             Mixed human oral                                                                        2       33          99.8                                            Microorganism                                                                           5       96          99.6                                                      24      0           N.S.                                __________________________________________________________________________     .sup.(a) Same as in Table XIII.                                               .sup.(b) Same as in Table XIII.                                               .sup.(c) Same as in Table XIII.                                          

In formulating Tables XIII - XIX representative aldehydes havinganticaries activity were selected from those tested as summarized inTables I - XII and incorporated in seven representative types ofproducts. The products included dextrose and sucrose syrups, obtainedcommercially in food grades, and compressed candy, hard candy,mouthwash, toothpaste and toothpowder. The five latter products alsoemployed food grade and reagent grade ingredients. These products wereformulated by well-known and representative recipes for each type ofproduct. The products were formed in batches of approximately 1 pound or1 liter and contained all their normal constitutents. Aliquots of eachproducts were blended with one of each of the representative aldehydesselected except in the case of hard candy.

It should be understood that the use of one or more aldehydes whichexist in dimeric or polymerized and hydrated forms are particularlysuited to use in hard candy compositions at high temperatures. Forexample, volatilization and oxidative degradation would be minimized bythe chemical structure of glycolaldehyde and pyruvaldehyde. For thisreason pyruvaldehyde was used as a representative ingredient in the hardcandy tested.

Aliquots of the aldehyde incorporating sugar syrups, confectioneries,and mouthwash formulations were added directly to assay flasks and mixedor dissolved as required. Aqueous extracts of the aldehyde incorporatedin toothpaste and toothpowder were prepared and aliquots of the filtratewere added to the assay flasks.

The assay flasks contained the necessary components for a normal growthresponse from the organisms employed, Lactobacillus casei ATCC 4646,originally a human oral isolate, Streptococcus spp. K1-R, human cariesisolate, and a mixed oral microbial population obtained fresh fromsaliva on the morning prior to the initiation of each assay incubationperiod. The assay flask medium was dissolved in distilled water in whichwas added an equal volume of filter sterilized human saliva to yield a50 percent saliva-medium combination. The medium contained all normalingredients such as yeast extract, proteose peptone number 3 (aproprietary formula of Difco Laboratories, Detroit, Michigan)monopotassium phosphate, Tween 80 (polyoxethylene sorbitan monoleate)and water, except a carbon source. This was supplied by the aliquot ofthe sucrose syrup, dextrose syrup, sucrose in the compressed candytablet and sucrose in the hard candy product. In addition, an aliquot ofsucrose solution concentrate was added to the assay flask as a carbonsource for evaluation of mouthwash, toothpaste, and toothpowdervehicles.

Sucrose syrup was prepared from cane sugar and was a 60 percent aqueoussolution. The dextrose syrup was a light corn syrup containing about37 - 38 percent dextrose equivalent.

The following examples list the recipes utilized to formulate vehiclesfor the anticaries compounds of this invention. The aldehydes of thisinvention were then incorporated in the vehicles and in vitro anticariesactivity was evaluated as summarized in Tables XIII - XIX.

EXAMPLE 1 - COMPRESSED CANDY TABLET

    ______________________________________                                        Ingredients        Parts by Weight                                            ______________________________________                                        Icing sugar, finely sifted                                                                       100                                                        Oil of peppermint  0.6                                                        Gum arabic, powdered                                                                             1-2                                                        Water              6                                                          Stearic acid, powdered                                                                           1                                                          ______________________________________                                    

EXAMPLE 2 - HARD CANDY

    ______________________________________                                        Ingredients         Quantity                                                  ______________________________________                                        Sugar, granulated   0.75      lbs.                                            Corn syrup, light   4         ozs.                                            Water               0.33-0.25 cups                                            ______________________________________                                    

The mixture was cooked to 290° F. and poured into an oiled trayPyruvaldehyde was added with stirring when the temperature of the batchreached 230° F. and before pouring and solidification of thecomposition.

EXAMPLE 3 - MOUTHWASH

    ______________________________________                                        Ingredients     Parts by Weight                                               ______________________________________                                        Sodium bicarbonate                                                                            2                                                             Sodium chloride 0.5                                                           Sucaryl sodium  0.33                                                          Flavor          0.8                                                           Ethyl alcohol   25                                                            Water           72.12                                                         ______________________________________                                    

The aldehyde ingredient was added in place of an equivalent amount ofwater in this and subsequent examples.

EXAMPLE 4 - TOOTHPASTE

    ______________________________________                                        Ingredients          Parts by Weight                                          ______________________________________                                        Sodium metaphosphate, insoluble                                                                    26.6                                                     Dicalcium phosphate  26.6                                                     Gum tragacanth       1.4                                                      Flavor               1.6                                                      Sodium lauryl sulphate, food grade                                                                 1.1                                                      Glycerol and water   42.7                                                     ______________________________________                                    

The quantity of water in relation to glycerol was found to be criticalin the preparation of the toothpaste. Excess water results in a slurry,rather than a paste, with insufficient body.

EXAMPLE 5 - TOOTHPOWDER

    ______________________________________                                        Ingredients          Parts by Weight                                          ______________________________________                                        Sodium metaphosphate 76.8                                                     Tricalcium phosphate 20                                                       Sodium lauryl sulphate, food grade                                                                 1.0                                                      Flavor               2.0                                                      Saccharin            0.2                                                      ______________________________________                                    

The lower aldehydes such as glycolaldehyde, crystalline dimer;pyruvaldehyde, aqueous syrup; d,1-glyceraldehyde solution andcrystalline dimer; and glutaraldehyde, employed as a 50 percent aqueoussolution, are water soluble and were employed directly either as powdersor aqueous solutions. The C₈ to C₁₂, longer chain aliphatic aldehydes,of which decyl and dodecyl (lauric) were selected as representative, areoil soluble and are prepared and added to the products as emulsions withfour parts of Tween 20, polyoxethylene sorbitan monolaurate. Thealdehyde concentrations in the products were randomly chosen between 1to 5 percent by weight. Limits for the concentrations were selected tocoincide with the data presented in Tables I - XII in order to verifythat the anticaries activity of the aldehydes in the product vehiclestested was equivalent to the activity previously established for thealdehydes alone.

In summary, Tables I and II above show pyruvaldehyde,d,1-glyceraldehyde, and glycolaldehyde exhibit significant anticarieseffects when incorporated in the diet of laboratory animals at a onepercent level. Tables IV - VII also show that pyruvaldehyde,d,1-glyceraldehyde, and glycolaldehyde alone or in combination exhibitexcellent acid production inhibition in oral microorganisms. Table VIIIshows that based on in vitro tests αhydroxypropionaldehyde also exhibitsexcellent anticaries activity.

Table II shows octanaldehyde, nonanaldehyde, decanaldehyde,undecylenicaldehyde, and lauric aldehyde exhibit significant anticariesactivity when incorporated at a one percent level in the diet oflaboratory animals. Tables IX - XII verify that the C₈ - C₁₂ aliphaticaldehydes exhibit excellent anticaries activity based upon in vitrotests against oral microorganisms. The C₆ and C₇ aldehydes,n-hexaldehyde, 2-hexene-1-al, 2,4-hexadienal, and n-heptaldehydeexhibited excellent acid production inhibition, but little or no growthinhibition in the oral microorganisms.

Table III shows that on the basis of in vivo testing with laboratoryanimals polyaldehydes such as dialdehyde starches and polysaccharidegums, specifically Dasol A, dialdehyde starch 50 percent oxidized,dialdehyde starch 90 percent oxidized, and dialdehyde galactamannan gumexhibit significant anticaries reduction when incorporated into the dietof laboratory animals at a one percent level. Table XII verifies theacid production inhibition on the basis of in vitro broth tube assaysinvolving cultures of oral microorganisms.

The effectiveness of the representative aldehydes incorporated inrepresentative product types at concentrations of from 1 to 5 percent isillustrated in Tables XIII - XIX. The tables show that the aldehydecompounds of this invention exhibit a significant degree of growth andacid-production inhibition of oral microorganisms during the 24-hourincubation period.

It should be noted that the data contained in Tables XVII, XVIII, andXIX presented difficulties in that the oral health products utilized asvehicles also contain other materials such as flavor oils and ethylalcohol which also inhibit acid-production of bacteria. Although theculture strains tested were significantly inhibited by the productstested, the effect attributable to the aldehyde ingredients was notreadily isolated. However, on the basis of all tests presented, thealdehydes exhibit a significant and prolonged anticaries activity, suchthat the results in Tables XVII, XVIII, and XIX merely confirm that thisactivity is not neutralized and their anticaries activity otherwisedissipated when the aldehydes are incorporated in commercial oral healthproduct formulations.

The invention as presented comprises the use of aliphatic mono anddialdehydes having from two to six carbon atoms, aliphatic monoaldehydeshaving from six to twelve carbon atoms, polyaldehydes such as dialdehydestarch and dialdehyde galactomannan gum, and mixtures thereof asingredients in oral health products and confectionery foods to impact aprolonged anticaries activity to these products and foods. Theanticaries aldehydes of this invention have been found to significantlyinhibit the growth and/or acid-production of oral microorganisms. Theuse thereof has been found to significantly reduce the incidences andextent of dental caries.

It is contemplated that the aldehydes actually utilized to compile thedata in Tables XIII - XIX are representative of the aldehydes tested inTables I - XII. It is intended that the products tested are illustrativeof oral health products and confectionery foods generally. Accordingly,this invention is not intended to be limited to the product formulationsutilized or those aldehydes shown to have anticaries activity which wereactually incorporated in the illustrative products for testing purposes,but limited only by the following claims.

What is desired to be secured by U.S. Letters Patent is claimed asfollows:
 1. An oral health composition comprising an effective amount ofpyruvaldehyde to inhibit the acid production and growth of oralmicroorganisms and a dental vehicle.
 2. The composition of claim 1wherein pyruvaldehyde is present in no more than about 5 percent byweight of the total composition.
 3. An oral health compositioncomprising an effective amount of glycoladehyde to inhibit the acidproduction and growth of oral microorganisms and a dental vehicle. 4.The composition of claim 3 wherein glycoladehyde is present in no morethan about 5 percent by weight of the total composition.
 5. An oralhealth composition comprising an effective amount of d,1-glyceraldehydeto inhibit the acid production and growth of oral microorganisms and adental vehicle.
 6. The composition of claim 5 wherein d,1-glyceraldehydeis present in no more than about 5 percent by weight of the totalcomposition.
 7. An oral health composition comprising an effectiveamount of α-hydroxypropionaldehyde to inhibit the acid production andgrowth of oral microorganisms and a dental vehicle.
 8. The compositionof claim 7 wherein α-hydroxypropionaldehyde is present in no more thanabout 5 percent by weight of the total composition.
 9. An oral healthcomposition comprising an effective amount of succinic dialdehyde toinhibit the acid production and growth of oral microorganisms and adental vehicle.
 10. The composition of claim 9 wherein succinicdialdehyde is present in no more than about 5 percent by weight of thetotal composition.
 11. An oral health composition comprising aneffective amount of an aldehyde selected from the group consisting ofoctanaldehyde, nonanaldehyde, undecylenic aldehyde, undecylic aldehyde,dodecyl aldehyde, methylnonylacetaldehyde to inhibit the acid productionand growth of oral microorganisms and a dental vehicle.
 12. Thecomposition of claim 11 wherein said aldehyde is present in no more thanabout 5 percent by weight of the total composition.
 13. An oral healthcomposition comprising an effective amount of dialdehyde starch toinhibit the acid production and growth of oral microorganisms and adental vehicle.
 14. The composition of claim 13 wherein said dialdehydestarch is present in no more than about 5 percent by weight of the totalcomposition.
 15. An oral health composition comprising an effectiveamount of dialdehyde galactomannan gum to inhibit the acid productionand growth of oral microorganisms and a dental vehicle.
 16. Thecomposition of claim 15 wherein said dialdehyde galactomannan gum ispresent in no more than about 5 percent by weight of the totalcomposition.